Rear end problem x 2

[quickchange]

Justin , But did you look in with a light ? Will it turn now either forward or back ,I know of several that done as you described & each time part of a tooth off,

[midgetracer]

I had the rear end lock up on a coupe I purchased. We pulled the rear end out and found a broken U joint. Thinking that was our only problem, we replaced it and reassembled it and found it still locked up. We pulled the rear end again and found that the nut on the driveshaft had broken off with the threaded end of the driveshaft. It had wedged into the ring and pinion. I had sold the car and the new owner was arriving the next day so it was a rush to get it together. Glad it happened before the new owner drove off with it and had problems.